Lock.



L. ROBERTS.

LOOK.

APPLICATION FILED SEPT. 6, 1911.

1,051,636, Patented Jan.28, 1913.

2 SHEETS-SHEET 1.

' WITNESSS 7 J5 f4 INVENTOR I L0 R Jaziv BY a o URL/M 6 (5/611? L.ROBERTS.

LOCK. APPLICATION FILED MP1. 6, 1911. 1,051,636. Patented Jan.28, 1913.

2 SHEETS-SHEET 2.

FIG. 5

WITNESSES INVENTOR L amls R 0 5612 25 fi w BY ,1

v M v ATTORNEYS UNITED STATES PATENT OFFICE.

LOUIS ROBERTS, OF BROOKVILLE, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO A.F.

BALMEB, or BROOKVILLE,

PENNSYLVANIA.

LOCK.

Specification of Letters Patent.

Patented Jan. 28, 1913.

Application filed September 6, 1911. Serial No. 647,807.

To all whom it may concern Be it known that I LOUIS Ronnnrs, a citizenof the United btates of America, residing at Brookville, in the countyof Jefferson and State of Pennsylvania, have invented certain new anduseful Improvements in Locks, of which the following is a specification,reference being had therein to the accompanying drawing.

This invention relates to looks, and more particularly to a key operatedlock for doors.

The primary provide a lock with object of my invention is to positiveand reliable means, in a manner as will be hereinafter set forth, forlocking the knob actuated latch of the lock simultaneously with the boltthereof, thereby providing a double lock or additional means inconnection with the ordinary locking bolt.

Another object of this invention is to furnish the locking bolt of alock with Sim le and effective means for locking the late of the lock,said means being actuated through the medium of an ordinary key employedfor shifting the locking bolt.

A further object of this invention is to provide a lock consisting ofcomparatively few parts easy to assemble, and highly eflicient for thepurposes for which it is intended.

Vith the above and other objects in view, the invention resides in thenovel construction, combination and arrangement of parts to behereinafter specifically described and then claimed.

Reference will now ings, wherein:-

Figure 1 is a front elevation of the lock with the face plate thereofremoved, showing the latch in an unlocked position, Fig. 2 is ahorizontal sectional View taken on the line IIII of Fig. 1, Fig. 3 is asimilarview taken on the line TIL-III of Fig. 1, Fig. 4 is a frontelevation of the lock, showing the latch thereof in a locked position,Fig. 5 is a vertical sectional view of the lock taken on the line VV ofFig. 1, Fig.

be had to the draw- 6 is an enlarged perspective view of a detachedlocking bolt, Fig. 7 is an enlarged perspective view of a detached latchactuating member, Fig. 8 is an enlarged perspective View of a detachedlatch, Fig. 9 is a side elevation of a key adapted to operate the lock,and Fig. 10 is an enlarged perspective view of a detached lockingmember. A look in accordance with this invention comprises a verticalguide or strick plate 1 having apertured lugs 2 and 3 and connected tothe lugs 2 by pins 1 is a frame 5 provided with openings 6 to receivescrews or other fastening means employed for retaining face plates 7 inengagement with the sides of the frame, thereby forming a lock casing.

Arranged in the upper end of the lock casing is a rectangular frame 8having the inner wall 9 thereof cut away, as at 10 to provide clearancefor a latch 11. The latch 11 has the inner end thereof, within the frame8, provided with two curved arms 12 having cross heads 13 and the outersides of these heads are slotted, as at 14: to receive guides15,.carried by the inner sides of the frame 8. The heads 13 are adaptedto be alternately engaged by the ends of a cam 16, carried by a knobsleeve 17. This sleeve has reduced ends 18 rotatably mounted in openings19 provided therefor in the plates 7. The sleeve 17 has a rectangularbore 20 to receive a knob spindle 21.

The latch 11 has a longitudinal slot 22 and the outer end of said latchextends through an opening 23 in the plate 1 and has a head 24- to limitthe movement of the latch into said opening. Extending into the slot 22is a projection 25 of the inner wall 9 of the frame 8, said projectionhaving an outwardly extending pin 26. The head at has an inwardlyprojecting pin 27 and encircling the pins 26 and 27 are the endconvolutions of a coiled spring 28. The purpose of this spring is tonormally maintain the latch in an extended position protrudingthroughthe opening 23 of the plate 1.

Arranged in the lower part of the casing is a housing for the bit end ofa key, said housing comprising a central plate 29 and ward plates 30,said ward plates having openings 31 registering with similar openings 32provided therefor in the plates 7. The central plate 29 has stud pins 33to receive the barrel 34 of a key 35. The barrel 34 has the end thereofprovided with bits 36 and 37 adapted to enter the openings 32 and 31.

Slidably mounted upon the upper edge of the housing is a locking bolt 38having a reduced end 39 adapted to extend through an opening 40 providedtherefor in the plate 1. The locking bolt 38 has a longitudinal verticalslot 41 to receive the central plate 29, said slot being of a greaterwidth than the central plate for a purpose that will presently appear.The outer lower edges of the locking bolt 38 are cut away to providebeveled surfaces 42 adapted to be engaged by the bit 37 of the key 35,whereby when said key is rotated within the casing, the bolt 38 can beshifted to a locked or unlocked position. The inner end of the bolt 38,at the upper edge thereof, has a guide 43 to receive a pin 44, carriedby the wall of the frame 5. Secured to the inner end of the guide 43 isthe lower end 45 of a latch locking member 46, said member movablyengaging the lower side of the frame 8, with the forward por tion ofsaid member extending upwardly and movably engaging the lower side ofthe latch 11, and lying within the path of the head 24.

Pivotally connected to the apertured lug 3 by a pin 47 are the aperturedlugs 48 of a locking member 49. This member has a web 50 and said webhas a vertical slot 51 providing clearance for the central plate 29,said web extending between the central plate 29 and the walls of thebolt 38. The lower edge of the web 50 is adapted to be engaged by thebit 36 of the key and said web elevated. The locking member 49 has atooth 52 at each side of the web 50, these teeth engaging in notches 53and 54 provided therefor in the upper edges of the walls of the lockingbolt 38. The teeth 52 are normally retained in one set of notches by aflat compression spring 55 having one end thereof suitably secured, asat 56 to the inner side of the plate 1.

As shown in Fig. 1 of the drawings, the locking bolt 38 is in anunlocked position, but the latch 11 can be freely moved by rotating theknob spindle 21 in one direction or the other. When the spindle isturned to the right or to the left, one of the ends of the cam 16 willengage one of the heads 13 and move the latch to a retracted position,thereby allowing the door to be opened. Immediately upon the knobspindle 21 being released, the latch 11 is restored to its normalposition through the medium of the conipression spring 28 which wasplaced under tension when the latch 11 was moved to a retractedposition. This movement of the latch 11 is independent of the latchlocking member. WVhen it is desired to lock the door, the key 35 can beinserted in the look from either side of the door, the barrel of the keyfitting over one of the pins 33 and abutting against the central plate29. When the key is rotated to the left, the bit 37 rides between theward plate 30 and the plate 7 into engagement with one of the beveledsurfaces 42 of the locking bolt 38 and said bolt can be shifted to alocked position, whereby the reduced end 39 thereof will protrude fromthe opening 40 of the plate into a keeper plate (not shown) carried bythe frame of the door. Simultaneously with the movement of the bit 37into the cut away portion of the bolt 38, is the movement of the bit 36between the central plate 29 and the wall of the locking bolt 38. Thebit 36 is of a greater length than the bit 37, and said bit engages thelower edge of the web 50 of the locking member, raising said member andmoving the teeth 52 out of engagement with the notches 53. When thelocking bolt 38 is shifted, the latch locking member 46 connected to theguide 43 is moved, whereby the upper end of the latch locking memberwill engage behind the head 24 of the latch 11 and lock said latch.Therefore the knob spindle 21 cannot be moved to retract the latch 11.When the locking bolt 38 is shifted to a locked position, the teeth 52of the locking member 49 engage in the set of notches 53 and lock thebolt 38 in a locked position until the web 50 of the locking member isagain elevated by a rotation of the key 35 to the right.

It is thought that the operation and utility of the lock will beapparent without further description, and while in the drawing there isillustrated a preferred embodiment of the invention, it is to beunderstood that the structural elements thereof are susceptible to suchvariations and modifications as fall within the scope of the appendedclaim.

What I claim is In a lock of the class described, a locking boltcomprising a pair of spaced plates united at their forward ends andhaving a reduced keeper engaging portion at said forward end portion,said bolt being open at its rear end and having an apertured guide onits upper edge at said rear end, a casing containing said bolt andhaving an opening where through said reduced portion passes, a pincarried by the casing and extending into the guide, pairs of oppositelydisposed spaced notches on the upper edges of said plates, each of saidplates being provided said plates and adapted to be raised by theadjacent its rear end with an exteriorly diskey prior to movement of thebolt. 10 posed notch adapted to receive the ward of In testimony whereofI afiix my signature a key and extending from the bottom edge in thepresence of two witnesses.

5 upward, a pawl mounted in said casing and LOUIS ROBERTS.

having an end adapted for engagement with Witnesses: one or the other ofsaid pairs of notches, NOAH WEBSTER, and a tongue on said pawl fittingbetween H. E. MCGAVEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

